This seems to be a different effort than some of the other construction e.g. military construction mostly around New Mexico or authorized funding in 2019 budget in the Rio Grande Valley, so will be useful to see what is authorizing this segment.

Not quite sending asylum seekers to sanctuary cities, but recently a group in TX sent some migrants to Portland, ME. Why Portland? The reason appears to be that they had a good reputation for assisting African refugees and hence that reputation caused some to ask to go to Portland (presumably also African but coming via the US Southern border

Meanwhile other cities like Albuquerque also seeing how they might assist. In this case, the largest city in the state assisting when they know areas further south like Las Cruces have many people coming in.